does the 2004 Sonata use a timing chain or a belt and at what point is it recommend to be changed

1 Answer

The Hyundai Sonata manufacturer recommends replacing the timing
belt every 60.000 miles or 4 years whichever comes first. If you want to
go over this recommendation, you might be able to pull more miles out
of the original timing belt. I wouldn't chance it. The engine in the
Sonata is an "interference" engine. This means that if the timing belt
breaks, the valves will hit the pistons and be bent. If the valves are
bent usually a new or remanufactured cylinder head is required.
Changing the cylinder head is expensive. ALways do the correct
maintenance as specified by the manufacturer.

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